/*
   Copyright (c) 2011, 2015 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *  2011-09-14 Marco Riccardi - initial implementation
 *  2015-01-11 Marco Riccardi - added methods getAid, getX, getNr
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.IElement;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLAttribute;
import org.mizartools.utility.xml.XMLElement;

public class Property implements IElement {

    public static final String NAME = "Property";

    private INode parentNode;
    private String aid = null;
    private Integer nr = null;
    private Integer x = null;

    private ArgTypes argTypes = null;
    private Typ typ = null;

    private Property(INode parentNode){
        this.parentNode = parentNode;
    }

    public INode getParentNode() {
        return parentNode;
    }

    public static Property newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        Property property = new Property(parentNode);
        XMLElement xmlElement = xmlElementList.poll();
        if (!xmlElement.getName().equals(NAME)){
            throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a " + NAME, xmlElementList);
        }
        for (XMLAttribute xmlAttribute : xmlElement.getXMLAttributeList()){
            if (xmlAttribute.getName().equals("aid")){
                if (property.aid == null){
                	property.aid = xmlAttribute.getValue();
                } else {
                    throw new ElementParseException(ElementParseException.DUPLICATE_ATTRIBUTE_ELEMENT, "XMLElement has a duplicate attribute " + xmlAttribute.getName(), xmlElementList);
                }
            } else 
            if (xmlAttribute.getName().equals("nr")){
                if (property.nr == null){
                    try {property.nr = Integer.parseInt(xmlAttribute.getValue());}
                    catch (Exception e) {throw new ElementParseException(ElementParseException.NOT_VALID_TYPE_OF_ATTRIBUTE_ELEMENT, "XMLElement has an attribute " + xmlAttribute.getName() + " with an invalid type", xmlElementList);};
                } else {
                    throw new ElementParseException(ElementParseException.DUPLICATE_ATTRIBUTE_ELEMENT, "XMLElement has a duplicate attribute " + xmlAttribute.getName(), xmlElementList);
                } 
            } else 
            if (xmlAttribute.getName().equals("x")){
                if (property.x == null){
                    try {property.x = Integer.parseInt(xmlAttribute.getValue());}
                    catch (Exception e) {throw new ElementParseException(ElementParseException.NOT_VALID_TYPE_OF_ATTRIBUTE_ELEMENT, "XMLElement has an attribute " + xmlAttribute.getName() + " with an invalid type", xmlElementList);};
                } else {
                    throw new ElementParseException(ElementParseException.DUPLICATE_ATTRIBUTE_ELEMENT, "XMLElement has a duplicate attribute " + xmlAttribute.getName(), xmlElementList);
                } 
            } else 
                throw new ElementParseException(ElementParseException.NOT_VALID_ATTRIBUTE_ELEMENT, "XMLElement has not a valid attribute " + xmlAttribute.getName(), xmlElementList);
        }

        if (!xmlElement.isEmpty()){
            while (true){
                xmlElement = xmlElementList.peek();
                if (xmlElement == null){
                    throw new ElementParseException(ElementParseException.UNEXPECTED_END_OF_FILE, "Unexpected end of XMLElement list");
                }
                if (xmlElement.getName().equals(NAME) && xmlElement.isEndElement()){
                    xmlElement = xmlElementList.poll();
                    break;
                }
                if (xmlElement.getName().equals("ArgTypes")){
                    if (property.argTypes == null) {
                        property.argTypes = ArgTypes.newInstance(property, xmlElementList);
                    } else { 
                        throw new ElementParseException(ElementParseException.DUPLICATE_ELEMENT, "XMLElement list contains a duplicated <ArgTypes> in element " + NAME, xmlElementList);
                    }
                } else 
                if (xmlElement.getName().equals("Typ")){
                    if (property.typ == null) {
                        property.typ = Typ.newInstance(property, xmlElementList);
                    } else { 
                        throw new ElementParseException(ElementParseException.DUPLICATE_ELEMENT, "XMLElement list contains a duplicated <Typ> in element " + NAME, xmlElementList);
                    }
                } else 
                    throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "The XMLElement " + xmlElement.getName() + " is not valid in " + NAME, xmlElementList);
            }
        }

        return property;
    }

    public LinkedList<XMLElement> getXMLElementList() {
        LinkedList<XMLElement> xmlElementList = new LinkedList<XMLElement>();
        XMLElement xmlElement = new XMLElement(NAME);
        boolean isEmpty = !(argTypes != null || typ != null);
        xmlElement.setEmpty(isEmpty);
        xmlElementList.add(xmlElement);
        if (this.aid != null) {
            XMLAttribute xmlAttribute = new XMLAttribute("aid", this.aid);
            xmlElement.getXMLAttributeList().add(xmlAttribute);
        }
        if (this.nr != null) {
            XMLAttribute xmlAttribute = new XMLAttribute("nr", this.nr);
            xmlElement.getXMLAttributeList().add(xmlAttribute);
        }
        if (this.x != null) {
            XMLAttribute xmlAttribute = new XMLAttribute("x", this.x);
            xmlElement.getXMLAttributeList().add(xmlAttribute);
        }

        if (this.argTypes != null){
            xmlElementList.addAll(this.argTypes.getXMLElementList());
        }
        if (this.typ != null){
            xmlElementList.addAll(this.typ.getXMLElementList());
        }
        if (!isEmpty) { 
            xmlElement = new XMLElement(NAME);
            xmlElement.setEndElement(true);
            xmlElementList.add(xmlElement);
        }
        return xmlElementList;
    }
    
    public String getAid(){
    	return aid;
    } 
    
    public Integer getNr(){
    	return  nr;
    }
    
    public Integer getX(){
    	return x;
    }

    public ArgTypes getArgTypes(){
        return argTypes;
    }

    public Typ getTyp(){
        return typ;
    }

	@Override
	public void accept(Visitor visitor) {
		if (visitor.visit(this)) {}
		visitor.endVisit(this);
	}

	@Override
	public String toString(){
		ToStringVisitor toStringVisitor = new ToStringVisitor();
		this.accept(toStringVisitor);
		return toStringVisitor.toString();
	}
}
